Entoloma undulatosporum

Pileipellis formed by cylindrical, parallel hyphae with pale brown intracellular pigment, up to 15 µm wide, with rounded emerging terminal elements slightly wider, and with clamped septa.

Lamellar edge without differentiated elements from basidia or basidioles (cheilocystidia absent).

Basidia clavate, slightly ventricose, up to 35 µm long, with basal clamp connections, 4-spored.

Spores angular with undulate outline, up to 10 very weakly defined angles, an indistinct apiculus at one end and a large internal oil droplet.